CVE-2026-0707— Keycloak: keycloak authorization header parsing leading to potential security control bypass
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I. Basic Information for CVE-2026-0707
Vulnerability Information
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Vulnerability Title
Keycloak: keycloak authorization header parsing leading to potential security control bypass
Source: NVD (National Vulnerability Database)
Vulnerability Description
A flaw was found in Keycloak. The Keycloak Authorization header parser is overly permissive regarding the formatting of the "Bearer" authentication scheme. It accepts non-standard characters (such as tabs) as separators and tolerates case variations that deviate from RFC 6750 specifications.
Source: NVD (National Vulnerability Database)
CVSS Information
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:L/A:N
Source: NVD (National Vulnerability Database)
Vulnerability Type
不正确的行为次序：在解析与净化处理之前进行授权
Source: NVD (National Vulnerability Database)
Vulnerability Title
Keycloak 安全漏洞
Source: CNNVD (China National Vulnerability Database)
Vulnerability Description
Keycloak是Keycloak开源的一种开源身份和访问管理解决方案。 Keycloak存在安全漏洞，该漏洞源于Authorization标头解析器对Bearer认证方案格式过于宽松，可能导致非标准字符被接受。
Source: CNNVD (China National Vulnerability Database)
CVSS Information
N/A
Source: CNNVD (China National Vulnerability Database)
Vulnerability Type
N/A
Source: CNNVD (China National Vulnerability Database)
Affected Products
| Vendor | Product | Affected Versions | CPE | Subscribe |
|---|---|---|---|---|
| Red Hat | Red Hat build of Keycloak 26.4 | 26.4.10-1 ~ * | cpe:/a:redhat:build_keycloak:26.4::el9 | |
| Red Hat | Red Hat build of Keycloak 26.4 | 26.4-12 ~ * | cpe:/a:redhat:build_keycloak:26.4::el9 | |
| Red Hat | Red Hat build of Keycloak 26.4 | 26.4-12 ~ * | cpe:/a:redhat:build_keycloak:26.4::el9 | |
| Red Hat | Red Hat build of Keycloak 26.4.10 | - | cpe:/a:redhat:build_keycloak:26.4::el9 |
II. Public POCs for CVE-2026-0707
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|---|
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Same Patch Batch · Red Hat · 2026-01-08 · 3 CVEs total
| CVE-2026-0719 | 8.6 HIGH | Libsoup: signed to unsigned conversion error leading to stack-based buffer overflow in lib |
| CVE-2025-14025 | 8.5 HIGH | Ansible-automation-platform/aap-gateway: aap-gateway: read-only personal access token (pat |
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Same product: Red Hat build of Keycloak 26.4
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V. Comments for CVE-2026-0707
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